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Theory of Machine

Theory of Machine
Relationship between the number of links (L) and number of pairs (P) is

P = 2L - 4
P = 2L + 4
P = 2L + 2
P = 2L - 2

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Theory of Machine
A disc is a spinning with an angular velocity ω rad/s about the axis of spin. The couple applied to the disc causing precession will be (where I = Mass moment of inertia of the disc, and ωP = Angular velocity of precession of the axis of spin)

(1/2). I ω ωP
(1/2).Iω²
I ω ωP
Iω²

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Theory of Machine
The Coriolis component of acceleration depends upon

Velocity of slider
Angular velocity of the link
None of these
Both (A) and (B)

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Theory of Machine
A rotary internal combustion engine has __________ cylinders.

Seven
Five
Four
Six

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Theory of Machine
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

P = W tan(α + φ)
P = W cos(α + φ)
P = W tan(φ - α)
P = W tan(α - φ)

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Theory of Machine
The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

Decreases
Remain same
None of these
Increases

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